Extrusive rock:Igneous rock that forms from lava on earth's surface.
Intrusive rock:Igneous rock that forms when magma hardens beneath earth's surface.
Porphyritic texture:An igneous rock texture in which large crystals are scattered on a background of much smaller crystals.
Table of Contents
Vocabulary
Extrusive rock:Igneous rock that forms from lava on earth's surface.
Intrusive rock:Igneous rock that forms when magma hardens beneath earth's surface.
Porphyritic texture:An igneous rock texture in which large crystals are scattered on a background of much smaller crystals.
Outline
Diagram